/*
 * chombo: Hadoop Map Reduce utility
 * Author: Pranab Ghosh
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License. You may
 * obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0 
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

package org.chombo.stats;

import org.chombo.util.Pair;

/**
 * count for some entity
 * @author pranab
 *
 * @param <T>
 */
public class ValueCounter<T> extends Pair<T, Integer> implements Comparable {
	private boolean ascending = true;
	
	/**
	 * @param entity
	 * @param count
	 */
	public ValueCounter(T entity, int count) {
		super(entity, count);
	}

	/**
	 * @param entity
	 * @param count
	 * @param ascending
	 */
	public ValueCounter(T obj, int count, boolean ascending) {
		super(obj, count);
		this.ascending = ascending;
	}

	/**
	 * @param entity
	 * @param ascending
	 */
	public ValueCounter(T obj,  boolean ascending) {
		super(obj, 0);
		this.ascending = ascending;
	}
	
	/**
	 * @return
	 */
	public T getObj() {
		return getLeft();
	}

	/**
	 * @param count
	 */
	public void add(int count) {
		right += count;
	}
	
	/**
	 * @return
	 */
	public int getCount() {
		return getRight();
	}
	
	@Override
	public int compareTo(Object obj) {
		ValueCounter<T> that = (ValueCounter<T>)obj;
		int thisCount = this.getRight();
		int thatCount = (Integer)that.getRight();
		return ascending ? (thisCount - thatCount) : (thatCount - thisCount);
	}

}
